23918940 has 72 divisors (see below), whose sum is σ = 73474128. Its totient is φ = 6297600.

The previous prime is 23918903. The next prime is 23918959. The reversal of 23918940 is 4981932.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 23918895 and 23918904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14140 + ... + 15740.

It is an arithmetic number, because the mean of its divisors is an integer number (1020474).

Almost surely, 2^23918940 is an apocalyptic number.

23918940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23918940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36737064).

23918940 is an abundant number, since it is smaller than the sum of its proper divisors (49555188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23918940 is a wasteful number, since it uses less digits than its factorization.

23918940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1699 (or 1694 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 23918940 is about 4890.6993364958. The cubic root of 23918940 is about 288.1248012352.

The spelling of 23918940 in words is "twenty-three million, nine hundred eighteen thousand, nine hundred forty".